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Spacecraft flew hundreds of thousands to hundreds of millions of kilometers from the earth, injecting speed when the size and direction of a slight error, arrived at target planets will appear large deviation error, for example, when Mars probe injecting speed 1 m/s speed (about one over ten thousand), arrived at Mars, about 100000 km distance deviation. Therefore, precise control and navigation must be carried out during the long flight. Flying to the moon is usually controlled by the orbital control system of the ground and space probe (see orbit control). Interplanetary flight distances, radio signal transmission time is long, the real-time remote control, can't so planets and interplanetary spacecraft orbit control system shall have the ability of autonomous navigation (see interstellar travel navigation and control). The United States, for example, "pirates" spacecraft in space flight of more than eight hundred million km, for 11 months of 2000 times of autonomous orbit adjustment, the final surface to achieve a soft landing on Mars, placement accuracy up to 50 km. In addition, in order to ensure the accuracy of the orbit control engine, the communication antenna is always aimed at the earth, and other systems work normally, and the detector has the autonomous attitude control ability
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The Razor scooter can be a folding scooter which was formulated with the J.D. Corporation. The Razor Scooter was obviously a project that's tackled by Gino Tsai. Gino was during the time Chief Executive of J.D. Corporation, in Taiwan.The account goes that Gino Tsai derived the idea for your Razor scooter as a consequence of his short stature which it took him too enough time to walk around his extensive bicycle factory in Chang Hua. The solution to defeat this problem ended up being go ahead and take old fashioned type scooter and provide it a radical modernisation. Subsequently several years later the Razor scooter came to be.
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